I don't know about you, but deja vu is a regular thing that happens in my life at least once a week, usually more. It is always a magical experience. If you haven't experienced deja vu, you cannot truly understand the bizarre feeling that waves through your body.
The idea that you have already lived a moment or the particular moment that you are in. Deja vu literally means ALREADY SEEN in French. Since I experience this craziness more often than most and I have a sneaking suspicion that I'm not psychic, I endeavored to understand what is actually going on.
You would think that deja vu comes from reincarnation (which has many sources let me tell you), but you would be wrong. Deja vu is all in your brain.
There are actually three types of deja vu: deja vecu, deja senti, and deja visite.
Deja vecu is what people typically mean when they say deja vu because it is the idea that you already experienced something. It is more than just seeing something again, it is the idea that you experienced everything again, like your emotions and all your other senses.
Deja senti has to do exclusively with human emotion; I have felt this before. This does not have the characteristics of sight and is often felt by epileptic patients before, during, or after seizures. It feels much less magical and supernatural, rather you feel the same emotion, just more intensely.
With epileptic patients, it can serve as a sign of a seizure because they have the same emotions and feeling before seizures that can warn them that they may have a seizure.
Deja visite is the intense feeling of thinking you have been somewhere before, even though you know you have not. Like walking somewhere you have never been, but also know the directions exactly, or standing at a pond and feel as though you have been there before. Deja visite is the most mystical of the three and is usually the one people associate with reincarnation because how you can know directions if you truly have never been there? HOW?
There are many what-ifs around deja vu because it is fleeting and rare, so studying it is rather difficult. It's like trying to study a shooting star with the naked eye, it just ain't happenin'.
There is a theory that the brain can glitch slightly and move experiences directly to long-term memory, making the experience seem like it had happened before some time ago.
However, a more popular theory is that the pathways in the brain get clumped and delayed. The brain receives information that goes to all the sensory stations, like auditory, visual etc. Deja vu then comes from information traveling slower down some pathways rather than others and thus receiving the information at two different times. The delay makes the brain think that you are actually experiencing the same thing twice.
I am honestly slightly disappointed that I am not psychic because that would be an exceptional thing to add to my resume, but alas I am not. Although I am still not fully convinced that there is no magic involved. It is just too weird to be all in my head.